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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_StaticPrefsBase_h
#define mozilla_StaticPrefsBase_h
#include <type_traits>
#include "mozilla/Atomics.h"
#include "mozilla/DataMutex.h"
#include "nsString.h"
namespace mozilla {
class SharedPrefMapBuilder;
// These typedefs are for use within init/StaticPrefList*.h.
typedef const char* String;
using DataMutexString = StaticDataMutex<nsCString>;
template <typename T>
struct IsString : std::false_type {};
template <>
struct IsString<String> : std::true_type {};
template <>
struct IsString<DataMutexString> : std::true_type {};
typedef Atomic<bool, Relaxed> RelaxedAtomicBool;
typedef Atomic<bool, ReleaseAcquire> ReleaseAcquireAtomicBool;
typedef Atomic<bool, SequentiallyConsistent> SequentiallyConsistentAtomicBool;
typedef Atomic<int32_t, Relaxed> RelaxedAtomicInt32;
typedef Atomic<int32_t, ReleaseAcquire> ReleaseAcquireAtomicInt32;
typedef Atomic<int32_t, SequentiallyConsistent>
SequentiallyConsistentAtomicInt32;
typedef Atomic<uint32_t, Relaxed> RelaxedAtomicUint32;
typedef Atomic<uint32_t, ReleaseAcquire> ReleaseAcquireAtomicUint32;
typedef Atomic<uint32_t, SequentiallyConsistent>
SequentiallyConsistentAtomicUint32;
// XXX: Atomic<float> currently doesn't work (see bug 1552086). Once it's
// supported we will be able to use Atomic<float> here.
typedef std::atomic<float> AtomicFloat;
template <typename T>
struct StripAtomicImpl {
typedef T Type;
};
template <typename T, MemoryOrdering Order>
struct StripAtomicImpl<Atomic<T, Order>> {
typedef T Type;
};
template <typename T>
struct StripAtomicImpl<std::atomic<T>> {
typedef T Type;
};
template <>
struct StripAtomicImpl<DataMutexString> {
typedef nsCString Type;
};
template <typename T>
using StripAtomic = typename StripAtomicImpl<T>::Type;
template <typename T>
struct IsAtomic : std::false_type {};
template <typename T, MemoryOrdering Order>
struct IsAtomic<Atomic<T, Order>> : std::true_type {};
template <typename T>
struct IsAtomic<std::atomic<T>> : std::true_type {};
namespace StaticPrefs {
void MaybeInitOncePrefs();
} // namespace StaticPrefs
} // namespace mozilla
#endif // mozilla_StaticPrefsBase_h
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